When people say set aside a test I get worried I need more vials.
I have a vial for each test along with a magnetic stirrer (pill). FC/CC, CH, TA and Salt (For Saltwater pool only) So think about that going forward to buy extra vials & stirrers in the future.
As stated by others above always rinse the vial with the pool sample before and after the test.
I do FC/CC and CH test one after another because they both use 10ml sample. I put a black line on the 10ml to make it easy to see
The TA is a 25ml sample and sometimes people new to testing forget that.
I have the spinner from the pro kit and I have two vials and two pills.
Great that you have the auto stirrer as that will make testing so much easier.
There is no harm in doing each test twice - it helps you gain confidence and you can see how each test changes colors.
Don’t stress as all you need to do is repeat the test.
One other suggestion - on each of the specific drop bottles I took a sharpie and wrote the number of drops on each bottle along with the volume.
So for example on the CH test on the R-0010 bottle I put 10ml, 10x, then on the R-011 bottle I put 10ml, 3x and nothing on the R-0012 bottle. Did similar for TA. It is just a reminder when I pick up the bottle as to the sample volume and the number of drops for that bottle.